官方的注解是
* EXAMPLE
* .CS
* -> tt "logTask"
* 3ab92 _vxTaskEntry +10 : _logTask (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
* ee6e _logTask +12 : _read (5, 3f8a10, 20)
* d460 _read +10 : _iosRead (5, 3f8a10, 20)
* e234 _iosRead +9c : _pipeRead (3fce1c, 3f8a10, 20)
* 23978 _pipeRead +24 : _semTake (3f8b78)
* value = 0 = 0x0
* .CE
* This indicates that logTask() is currently in semTake() (with
* one parameter) and was called by pipeRead() (with three parameters),
* which was called by iosRead() (with three parameters), and so on.